oil level on dipstick keeps rising
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This is a discussion on oil level on dipstick keeps rising within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; 03 wrx 4eat The oil level on my dipstick rises over time after each oil change. What can cause this? ...

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    oil level on dipstick keeps rising

    03 wrx 4eat

    The oil level on my dipstick rises over time after each oil change. What can cause this? The oil itself looks clean; no "chocolate milk" color to it. So I would think its not coolant getting into the oil (i.e. blown HG). The car does have high miles (135 k), but runs great. No loss of power, no smoke from exhaust, etc.

    Any ideas?
    Last edited by TonyG; 03-02-2008 at 05:43 PM.
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    Registered User rr1911's Avatar
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    your not draining all of the oil each time
    or your putting in just a little bit more everytime you change the oil
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    The level is correct after the oil change. When I checked it a few days later, its was a little higher. A few days after that, it was higher yet, and so on. Right now, its at the max fill level.

    I always check it in my garage, so conditions are the same. Also, this has been happening every oil change lately. I think something is getting into the oil, I just don't know what it is.
    Last edited by TonyG; 03-03-2008 at 07:01 AM.

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    He simply abides. SD_GR's Avatar
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    Is the level of another fluid constantly dropping?

    Go to Blackstone lab's web site, and order a sample kit. Read the directions and at your next oil change collect a sample and send it to them for analysis. If there is another fluid in the oil, you'll know.
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    Quote Originally Posted by SD_GR View Post
    Is the level of another fluid constantly dropping?

    Go to Blackstone lab's web site, and order a sample kit. Read the directions and at your next oil change collect a sample and send it to them for analysis. If there is another fluid in the oil, you'll know.
    Thanks, I think I'll try Blackstone's analysis service.
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    Registered User Flyingjibus's Avatar
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    Make sure to post your update in this thread. I am very curious about this one. Thanks!
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    Resident meany-rator 06wrx4me's Avatar
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    Umm how much oil are you putting in at every oil change?
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    Quote Originally Posted by Flyingjibus View Post
    Make sure to post your update in this thread. I am very curious about this one. Thanks!
    Will do. I am suspecting it may be a little gasoline getting into the crankcase oil. The flashpoint measurement that Blackstone does should verify this.

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    He simply abides. SD_GR's Avatar
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    Are you having a cold winter? Fuel usually just burns off unless you are experiencing very cold temps or travel very short distances, not allowing the car to fully warm up, reach full temp, and burn off the fuel. The lab can tell you for sure though as you say.
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    Registered User Destros's Avatar
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    Are you checking right after you drive? The oil level is known to rise when it's hot. It is less viscous and returns to the crankcase faster. I know on my 05 WRX, the dipstick has an additional notch above the max line to check correct level when the oil is hot.
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    Quote Originally Posted by Destros View Post
    Are you checking right after you drive? The oil level is known to rise when it's hot. It is less viscous and returns to the crankcase faster. I know on my 05 WRX, the dipstick has an additional notch above the max line to check correct level when the oil is hot.
    I don't have a "hot" vs "cold" notch, but I do have a max fill notch and that's where the oil level is now. I have tried checking the oil level when the engine is hot, warm, and cold. Yes there are some small variations in the three cases, but what I'm talking about is a much larger increase in the oil level as the weeks pass on. Now, the oil is level is high even when the engine is cold. It's not "measurement error," I have three cars, and this is the only one that's doing this.
    -09 Impreza 2.5GT 13.72/ 99.4/1.926
    -99 Mustang 10.64/136.41.57
    -08 R32 (bone stock)

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    Registered User Destros's Avatar
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    You might have worn rings or clogged PCV. Which would provide excessive blow-by which over time would join the oil and raise the level. But I don't think as quickly as you describe. Have you tried changing your oil when it's hot? You'll drain more out. Other than that check other fluid levels dropping.
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